Q: What is the sum of all factors of the number 687,979 excluding 687,979?

 A: 1,997

Why is 1,997 the sum of all factors of 687,979, excluding 687,979?

The factors of the number 687,979 are: 1, 443, 1553, 687979.

If you add them up, you will get the total of 687,980. Now subtract 687,979 to get 1,997


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